SCIENCE AND TECHNOLOGY ENGLIAH FOR MECHANICAL ENGINEERING 1. Thermomechanical treatment (TMT) including solution di treatment, cold working and aging has been applied to a Fe- FA 29Mn-90A1-10C alloy, which has been considered a potential A substitute for Fe-Ni-Cr stainless steel. The tensile property of tiz. 处理 TMT treated alloy has been compared with that of conventional h p炉硬他金 ordered(CPH) alloy without cold working. It特 was found that at peak-aged condition the tensile strength of TMT t+ alloy reaches 1332 MPa, which is improved by 20% as compared with CPH if the amount of cold work is 30% by rolling for TMT alloy.The啦伸通 of the peak-aged TMT is still very good 14.5%). An important phenomenon was also observed that the cold work applied to TMT alloy does not shorten the peak-aging time. This contradicts with the general enhancing effect of cold work on aging. The mechanisms of the improvement in tensile strength and of the sluggish effect of cold work on aging was discussed in terms of transmission of electron microscopySCIENCE AND TECHNOLOGY ENGLISH FOR MECHANICAL ENGINEERING 拉伸,延长 沉淀硬化合金 1. Thermomechanical treatment (TMT) including solution treatment, cold working and aging has been applied to a Fe- 29Mn-9.0Al-l.0C alloy, which has been considered a potential substitute for Fe-Ni-Cr stainless steel. The tensile property of TMT treated alloy has been compared with that of conventional precipitation-hardened (CPH) alloy without cold working. It was found that at peak-aged condition the tensile strength of TMT alloy reaches 1332 MPa, which is improved by 20% as compared with CPH if the amount of cold work is 30% by rolling for TMT alloy. The elongation of the peak-aged TMT is still very good (14.5%). An important phenomenon was also observed that the cold work applied to TMT alloy does not shorten the peak-aging time. This contradicts with the general enhancing effect of cold work on aging. The mechanisms of the improvement in tensile strength and of the sluggish effect of cold work on aging was discussed in terms of transmission of electron microscopy. 固 溶 热 处 理 拉 伸 特 性